Post JSON from python to PHP don't give expected result

[pgagnebin]

Hello.
I need to send JSON data from python to PHP.
Python and PHP are located on different servers.
I test with this python code :

import requests
import json

url = ".../rcv_json.php"
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}

# data to be sent to api 
myjson={"firstName": "Jane","lastName": "Doe","hobbies": ["running", "sky diving", "singing"],"age": 35,"children": [{"firstName": "Alice","age": 6},{"firstName": "Bob","age": 8}]}
# myjsond for tests
myjsond = json.dumps(myjson, sort_keys=False, indent=1, separators=(',', ':'), skipkeys=True)

print(myjson)
print("---")
print(myjsond)
print("---")

# sending post request and saving response as response object 
r = requests.post(url, myjson, headers)

# extracting response text 
#r.text

print(r.text)

JSON data has hierarchical data, as it's possible to check with print(myjson).

The php code (rcv_json.php) is simply next (it's php, not python ):

<?php
var_dump($_POST);
?>

And the printed result is :

Output:
array(5) {
  ["firstName"]=>
  string(4) "Jane"
  ["lastName"]=>
  string(3) "Doe"
  ["hobbies"]=>
  string(7) "singing"
  ["age"]=>
  string(2) "35"
  ["children"]=>
  string(3) "age"
}

The data on sub-hierarchy (the hobbies and children) are missing.

I don't find what I do wrong...
If I try to send myjsond data, $_POST array is empty in php.

Thank's for help !

[micseydel]

This seems like a PHP question rather than Python, the Python looks fine.